#Metrology
Show and tell: NIST physicist Howard Yoon holds up the triple point of water, the point at which water exists simultaneously as a solid, liquid and gas in thermal equilibrium (when the water has no net gain or loss of heat).
For many years all around the globe, the triple point of water defined the metric system’s unit of temperature (the kelvin). But there were slight differences from one lab to the next. Concentrations of the hydrogen and oxygen isotope in the water changed depending on where in the world the measurements were happening.
Then, scientists agreed upon a fixed value for the triple point of water. They based it on the Vienna Standard Mean Ocean Water (a specific chemical composition of distilled ocean water, a standard formulation established by @iaeaorg in Vienna). No more changes.
Now, the triple point of water is one of multiple fixed points that we use to ensure the accuracy of standard platinum resistance thermometers, the basis of the international scale for temperature. Their accuracy trickles down through calibration labs and comparisons to the thermometers that measure, for example, your room temperature or the heat behind manufacturing processes.
#Temperature #Thermometry #Thermometer #Metrology
Behind every precision part is a commitment to quality 🔍
Today we’re recalibrating our CNC CMM machine to ensure every measurement stays accurate and every component meets exact specifications 🕵️♂️
#qualityinspection #metrology #precisionmanufacturing #engineering #inspection
Types of Measurement Tools
1. Vernier Caliper
A precision instrument used to measure internal, external, and depth dimensions with high accuracy.
2. Micrometer Screw Gauge
Used to measure very small thickness or diameter with extreme precision.
3. Steel Ruler
A basic measuring tool used for quick linear measurements in workshops and engineering drawings.
4. Dial Indicator
Used to measure small linear distances and detect alignment errors in machines.
5. Feeler Gauge
A set of thin metal blades used to measure small gaps or clearances between components.
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#engineering
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Tiny parts. Big precision.
Watch Titans of CNC use Mitutoyo's Profile Projector to inspect fine details with clarity and accuracy!
Book a demo today: https://www.mitutoyo.ca/contact-us/request-a-demo/
@titansofcnc #Mitutoyo #TitansOfCNC #ProfileProjector #Precision #Measurement #Metrology #QualityControl #Inspection #CNC #Manufacturing #MachineShop #Engineering #TightTolerances #QualityAssurance
This microscope from GelSight can take 3D impressions of the object you’re looking at - whether that’s a poppy seed (which aren’t the shape you think they are), or even salt flakes - and it’s used in metrology.
How do wind turbines keep turning?
Huge rings called slewing bearings keep the nacelle and blades moving. Because of their size, checking quality is often complex and time consuming. With ZEISS measurement technology, an entire bearing can be verified in a single setup. Fewer interruptions mean faster processes, less risks of error, and more consistent quality supporting the growth of renewable energy.
#ZEISS #Innvoation #Metrology #WindEnergy #Sustainability
Take a look inside a lab! Today, we’re offering a sneak peek of some new work being done in the room where the NIST-4 Kibble Balance is located. This mechanical and quantum electrical device serves as the primary standard for the unit of mass in the International System of Units (SI) or metric system.
It uses a high-accuracy comparison of electrical power that’s measured in terms of quantum voltage and resistance with the mechanical power of a physical kilogram mass in motion.
But that’s not all that’s happening here. Researcher Beatrice Rodiek from PTB, the national metrology institute in Germany, visited the lab space and brought the silicon sphere – a mass standard – with her.
This standard is based on a method – called the X-Ray Crystal Density method (XRCD) – that essentially counts the number of atoms inside the silicon sphere. The number of atoms is multiplied by the mass of one single silicon atom, which gives you the mass of the sphere.
Beatrice is working with NIST researcher Darine El Haddad to accomplish something that hasn’t happened before: directly bringing the two realization methods (Kibble Balance and XRCD) together. This is also the first time NIST’s Kibble Balance will directly measure a silicon sphere.
Why is this happening? These two methods have very small differences in their numbers and by bringing these two standards together, researchers hope they can close that gap. So stay tuned for the final results!
#Metrology #Electronics #Mass #Metric #Standards
Metrology magic.
During development and manufacturing, every OnTrac™ cap is put through its paces on a 5-axis metrology machine. Measuring at a speed of 500mm per second to ensure every component is fit for purpose.
Now that’s attention to detail.
#DysonOnTrac #Headphones
Metrology magic.
During development and manufacturing, every OnTrac cap is put through its paces on a 5-axis metrology machine. Measuring at a speed of 500mm per second to ensure every component is fit for purpose.
Now that’s attention to detail.
#DysonMY #DysonOnTrac
How do wind turbines keep turning?
Huge rings called slewing bearings keep the nacelle and blades moving. Because of their size, checking quality is often complex and time consuming. With ZEISS measurement technology, an entire bearing can be verified in a single setup. Fewer interruptions mean faster processes, less risks of error, and more consistent quality supporting the growth of renewable energy.
#ZEISS #Innvoation #Metrology #WindEnergy #Sustainability
Step inside this REALM that’s full of measurement possibilities. This room is called the Robotically Enhanced Antenna Laboratory for Metrology, aka REALM.
Here, NIST researchers use NIST-pioneered robotic antenna measurement systems called the Large Antenna Positioning Systems (LAPS) and the Configurable Robotic MilliMeter-wave Antenna (CROMMA) that essentially are really accurate radio-frequency holographic cameras for doing antenna measurements.
The lab is based at our campus in Boulder, Colorado, and serves three key areas:
📡 Standards development and antenna calibration services
📡 Engagement with stakeholders in industry and government agencies
📡 R&D
Why is this work important? Antennas are everywhere in modern day life, from cellphone towers to satellites in space. The measurements done on them can be traced back to NIST through our reference antennas and measurement methodologies. Organizations, such as aerospace manufacturers, use them to verify that the antennas they design or are producing are working as intended.
The room is also filled with various cones made of foam on the floors and ceilings, which absorb the microwave wavelengths emitted from the antennas to ensure the measurements aren’t distorted. These features make the room similar to an anechoic chamber or quiet room.
#Electronics #Antennas #Measurements #Robotics #Metrology
Metrology magic.
During development and manufacturing, every OnTrac™ cap is put through its paces on a 5-axis metrology machine. Measuring at a speed of 500mm per second to ensure every component is fit for purpose.
Now that’s attention to detail.
#dysonontrac #headphones #dyson
